Hey Tinah! Great to see other newbies joining. I've just bought my first property in Bristol RI, so I'm in the same boat as you :)
As for lead, my partner's relatives have been in real estate for a long time. They don't run the best system, and while they know about the laws, they have never checked for lead or gotten their houses officially deleaded before renting to children under 6. Personally, I think health and safety are the two most important things when running any business, including real estate. I would get the house certified deleaded ASAP if the tenant's lease continues into your ownership of the house. If you don't have the money, you may be able to get a loan to spread the cost over a few months to get the rental income to pay for it. However, the only experience I have with it is my relatives not following the laws, so the only thing I can solidly recommend is to definitely not just ignore the laws haha.